Lunch box



FIG. 1 is a perspective view of a lunch box showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is an open state perspective view thereof; and

FIG. 9 is a partially enlarged view of FIG. 3 .

The broken lines shown on the drawings depict portions of the lunch box that form no part of the claimed design. 

CLAIM The ornamental design for a lunch box as shown and described. 